//
//  QSBAnimatedScroll.m
//
//  Copyright (c) 2010 Google Inc. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//    * Redistributions of source code must retain the above copyright
//  notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above
//  copyright notice, this list of conditions and the following disclaimer
//  in the documentation and/or other materials provided with the
//  distribution.
//    * Neither the name of Google Inc. nor the names of its
//  contributors may be used to endorse or promote products derived from
//  this software without specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
//  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
//  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
//  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
//  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
//  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
//  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
//  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
//  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//

#import "QSBAnimatedScroll.h"

@implementation QSBAnimatedScroll

@synthesize userInfo = userInfo_;

- (id)initWithView:(NSView *)view endPoint:(NSPoint)endPoint {
  if ((self = [super initWithDuration:0.25 animationCurve:NSAnimationEaseInOut])) {
    if (view) {
      endPoint_ = endPoint;
      view_ = [view retain];
      startPoint_ = [view visibleRect].origin;
      [self setAnimationBlockingMode:NSAnimationNonblocking];
    } else {
      [self release];
      self = nil;
    }
  }
  return self;
}

- (void)dealloc {
  [view_ release];
  [userInfo_ release];
  [super dealloc];
}

- (void)setCurrentProgress:(NSAnimationProgress)progress {
  [super setCurrentProgress:progress];
  float value = [self currentValue];
  CGFloat deltaX = (endPoint_.x - startPoint_.x) * value;
  CGFloat deltaY = (endPoint_.y - startPoint_.y) * value;
  NSPoint newPoint = NSMakePoint(startPoint_.x + deltaX, startPoint_.y + deltaY);
  [view_ scrollPoint:newPoint];
}

@end

